Whenever I try to type on a server it crashes.

What I expected to happen was...:
That it would send what I typed.

What actually happened was...:
It crashed.

Steps to Reproduce:
1. I type "t" to type in the chat
2. ...then I typed what what I want to say
3. ...I press enter and Minecraft crashes.

---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 7/8/13 3:13 PM
Description: Deserializing Message

java.lang.ClassCastException: com.google.gson.JsonPrimitive cannot be cast to com.google.gson.JsonObject
at cw.a(SourceFile:14)
at cw.deserialize(SourceFile:10)
at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
at com.google.gson.Gson.fromJson(Gson.java:795)
at com.google.gson.Gson.fromJson(Gson.java:761)
at com.google.gson.Gson.fromJson(Gson.java:710)
at com.google.gson.Gson.fromJson(Gson.java:682)
at cu.c(SourceFile:220)
at bcn.a(SourceFile:518)
at dl.a(SourceFile:49)
at cn.b(SourceFile:350)
at bcn.d(SourceFile:95)
at bcu.b(SourceFile:60)
at atn.k(SourceFile:1380)
at atn.S(SourceFile:662)
at atn.d(SourceFile:618)
at net.minecraft.client.main.Main.main(SourceFile:101)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at cw.a(SourceFile:14)
at cw.deserialize(SourceFile:10)
at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
at com.google.gson.Gson.fromJson(Gson.java:795)
at com.google.gson.Gson.fromJson(Gson.java:761)
at com.google.gson.Gson.fromJson(Gson.java:710)
at com.google.gson.Gson.fromJson(Gson.java:682)

– Serialized Message –
Details:
JSON string: Cannot send chat message.
Stacktrace:
at cu.c(SourceFile:220)
at bcn.a(SourceFile:518)
at dl.a(SourceFile:49)
at cn.b(SourceFile:350)
at bcn.d(SourceFile:95)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bcx['TipqiT'/1398, l='MpServer', x=262.50, y=84.62, z=36.87]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (262,83,39), Chunk: (at 6,5,7 in 16,2; contains blocks 256,0,32 to 271,255,47), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 10267618 game time, 11395414 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 1 total; [bcx['TipqiT'/1398, l='MpServer', x=262.50, y=84.62, z=36.87]]
Retry entities: 0 total; []
Stacktrace:
at bcu.a(SourceFile:284)
at atn.k(SourceFile:1387)
at atn.S(SourceFile:662)
at atn.d(SourceFile:618)
at net.minecraft.client.main.Main.main(SourceFile:101)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bcx['TipqiT'/1398, l='MpServer', x=262.50, y=84.62, z=36.87]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (262,83,39), Chunk: (at 6,5,7 in 16,2; contains blocks 256,0,32 to 271,255,47), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 10267618 game time, 11395414 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 1 total; [bcx['TipqiT'/1398, l='MpServer', x=262.50, y=84.62, z=36.87]]
Retry entities: 0 total; []

– System Details –
Details:
Minecraft Version: 1.6.1
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 267226904 bytes (254 MB) / 429588480 bytes (409 MB) up to 954466304 bytes (910 MB)
JVM Flags: 1 total; -Xmx1G
AABB Pool Size: 7667 (429352 bytes; 0 MB) allocated, 15 (840 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.6.1
LWJGL: 2.9.0
OpenGL: GeForce GTX 670MX/PCIe/SSE2 GL version 4.2.0, NVIDIA Corporation
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Pack: OzoCraft-1.6.zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: 4648 (260288 bytes; 0 MB) allocated, 13 (728 bytes; 0 MB) used